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Optical illusions

Can you believe your eyes? Stretch your brain with these mind-bending illusions.

An apparition? »

Colour contrast »

Dancing lights »

Does size matter? »

Hermann grid »

Motion after effects »

The café wall »

The Fraser spiral »

The impossible triangle »

The impossible trident »

The Kaniza Illusion »

The Necker cube »

The Stroop effect »

Young or old... »

Science Fact

You shed about 10 billion skin cells a day